Page Size Analyzer
Breakdown of HTML, inline scripts, inline styles and referenced assets.
Quick Facts
- ✅ Breakdown: HTML, CSS, JS, images, fonts, video
- ⚡ Speed: Under 3 seconds live fetch
- 💰 Cost: 100% free — unlimited runs
- 📊 Metrics: total weight, request count, compression savings, LCP impact
- 🎯 Target: <1.5MB total, <200KB JS, <500KB images (2026 mobile budget)
- 🔄 Last Updated: June 2026
What Is Page Size Analyzer?
A page size analyzer is a tool that fetches every resource a webpage loads (HTML, CSS, JavaScript, images, fonts, media) and reports the total transfer weight, resource count, and per-category breakdown. SEOAcademys' Free Page Size Analyzer live-fetches any URL, categorizes every asset, estimates gzip/brotli compression savings, and highlights the specific resources that push you past the 2026 mobile performance budget (1.5MB total, 200KB JavaScript, 500KB images).
What Does Page Size Analyzer Check?
Page Size Analyzer is a free SEO tool from SEOAcademys that performs real-time analysis on any live URL. It evaluates 8+ signals using the same methodology trusted by 2.4M+ marketers worldwide — with no signup, no credit card, and zero data stored on our servers.
Total page weight (compressed + uncompressed)
Total page weight (compressed + uncompressed)
Per
Per-category breakdown: HTML, CSS, JS, images, fonts, video, other
Request count with slowest resources highlighted
Request count with slowest resources highlighted
Compression savings estimate if gzip/brotli enabled
Compression savings estimate if gzip/brotli enabled
Image optimization estimate (WebP/AVIF conversion)
Image optimization estimate (WebP/AVIF conversion)
Unused CSS/JS heuristic (bytes shipped vs likely used)
Unused CSS/JS heuristic (bytes shipped vs likely used)
LCP impact estimate based on largest resources
LCP impact estimate based on largest resources
Mobile
Mobile-budget scorecard vs 2026 targets
Why Page Size Analyzer Matters for Google Rankings in 2026
Page weight is the single strongest predictor of Core Web Vitals scores, which Google has confirmed as a ranking factor since 2021. HTTPArchive's 2025 data shows the median mobile page ships 2.4MB — but pages in the top 10% of Google rankings ship under 1MB. Every 500KB of unnecessary weight adds ~1 second of LCP on mid-tier mobile devices (Moto G Power on 4G, Google's test baseline). Weight also drives bounce rate: Google research shows bounce probability rises 32% when load time goes from 1s to 3s, and 90% when it hits 5s.
How to Use Page Size Analyzer
- 1
Step 1: Enter Your URL
Paste any public URL into the field above. Page Size Analyzer accepts both
http://andhttps://and auto-resolves redirects. - 2
Step 2: Run the Analysis
Click Analyze. Our edge servers fetch the live HTML in under 8 seconds and run a deep parse — no caching, always fresh.
- 3
Step 3: Fix the Issues
Review the prioritized fix list, copy the recommended snippets, and re-run Page Size Analyzer after deploying to confirm the score change.
What Page Size Analyzer Checks — Full List
Page Size Analyzer vs GTmetrix: Why Free Wins
Paid SEO suites cost $99–$449/month. Page Size Analyzer runs the same on-page checks in real time, completely free.
| Feature | SEOAcademys | GTmetrix | Ahrefs |
|---|---|---|---|
| Price | Free forever | $139.95/mo | $129/mo |
| Signup required | No | Yes | Yes |
| Live URL fetching | Yes | Yes | Yes |
| AI crawler signals (GPTBot, ClaudeBot) | Yes | No | Partial |
| Daily limit | Unlimited | 100 reports | 500 credits |
| Data stored | Nothing | Indefinitely | Indefinitely |
| Export CSV / JSON | Yes | Yes (paid tier) | Yes (paid tier) |
Common Page Weight Tool Issues Found
Unoptimized hero image (>500KB PNG/JPEG)
The single most common LCP killer. Convert to WebP or AVIF — typical 60-80% size reduction with no visible quality loss.
Unminified JavaScript in production
Development bundles can be 3-5× larger than production builds. Verify your build process runs a minifier (esbuild, terser, swc).
Full icon fonts loaded for 3 icons used
Font Awesome full = 300KB+. Load only the specific icons used, or switch to SVG icons inlined per component.
Third-party scripts bloating the payload
Chat widgets, analytics, ads, A/B testers regularly add 500KB-1MB. Audit every third-party — do you actually use it?
Multiple JS frameworks loaded
Legacy pages sometimes load jQuery + React + Vue simultaneously. Consolidate to one framework.
No compression (Content-Encoding absent)
Missing gzip/brotli inflates payload 3-5×. One-line server config fix.
Frequently Asked Questions About Page Size Analyzer
What is a good page size for SEO?
For 2026 mobile-first indexing: total page under 1.5MB, JavaScript under 200KB (gzipped), images under 500KB total, HTML under 100KB. Pages ranking in Google's top 10 mobile results average 1.1MB per HTTPArchive 2025 data. Every 500KB over budget adds ~1 second of LCP on mid-tier mobile — directly hurting Core Web Vitals rankings.
How does page size affect Core Web Vitals?
Directly and significantly. LCP (Largest Contentful Paint) is dominated by the largest visible image or text block — heavier assets = slower LCP. INP (Interaction to Next Paint) is dominated by JavaScript execution — more JS = slower INP. CLS (Cumulative Layout Shift) is worsened by fonts loading late — bigger font files = more CLS. All three CWV metrics improve as page weight decreases.
What are the largest contributors to page weight?
Ranked by frequency: (1) images (median 50% of page weight — often unoptimized JPEG/PNG when WebP/AVIF would cut 60%); (2) JavaScript (median 25% — unminified bundles, unused frameworks); (3) fonts (median 10% — full icon fonts, too many weights); (4) third-party scripts (median 10% — chat, analytics, ads). Fixing images and JS captures 75% of the win.
Does page weight matter more on mobile than desktop?
Yes, dramatically. Google uses mobile-first indexing — the mobile version of your page is what gets ranked. Mobile devices have 3-5× slower CPUs and 5-10× slower networks than desktops. A 3MB page loading in 2 seconds on desktop takes 8-12 seconds on mid-tier mobile 4G. Google's Core Web Vitals scoring uses mobile as the primary signal.
How can I reduce page size quickly?
Highest-ROI order: (1) convert all images to WebP or AVIF — typically saves 500KB-2MB per page; (2) enable gzip/brotli at server — saves 60-80% on text assets; (3) lazy-load below-fold images (loading="lazy"); (4) remove unused JavaScript with tree-shaking; (5) audit third-party scripts and remove any not driving revenue; (6) subset custom fonts to only the characters used.
Do CDNs reduce page size?
CDNs do not reduce byte size, but they reduce transfer time by serving assets from a location physically closer to the user. Cloudflare, Fastly, and Vercel additionally offer automatic image optimization (WebP conversion), Brotli compression, and HTTP/3 — which together can effectively deliver 40-60% smaller payloads than a bare origin server.
What's the difference between page size and page weight?
They mean the same thing. 'Page size' and 'page weight' both refer to the total bytes transferred to render the page — HTML + CSS + JS + images + fonts + media + third-party scripts. Measured compressed (what actually travels over the network) or uncompressed (what the browser processes). For SEO and performance, always focus on the compressed transfer size.